Electric-current generator.



Patented Mar. 2, 1909.

mama's 0. o; RUPRECHT.

ELECTRIC CURRENT GENERATOR. APPLIOATION FILITID JULY 28. 1905.

k M x Z 1. g 3 x M x QN 0. c. RUPREOHTJ ELECTRIC CURRENT GENERATOR.

I. APPLICATION FILED JULY 28, 1905- 914,3 1 1 Patented Mar. 2, 1909.

2 nnms-snnm 2.

WIN/E8858:

MTOIIIIEFS,

1 by N and S.

piece comprising a metallic plate 3 which. l thereby inducing a current in said or-ii. 110

To all whom it mayconcern:

CHARLES o. nurnncnr, or CLEVELAND, onro, ASSIGNOR, BY inlsun ASSIGNMENTS, 'ro

'RUPREOHT ELECTRICAL COMPANY, or CLEVELAND, 01110, A OOPARTNERSHIP.

" ELECTRIC-CURRENT GENERATOR.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed July 28, 1905. Serial No. 271,679.

Be it known that 1, CHARLES C. Rurnnonr, a citizen of the Unlted States of America,

residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certam new and useful Improvements 1n Electric Cur tent Generators; and I hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to apparatus for the production of alternating currents of elec tricity, and has for its objects to provide a generator of this type of great eiiiciency, simplicity of construction, and with a minimum number of movable parts, and that will greatly reduce hysteresis and self-induction and the losses incidental thereto while maintaining and even building up the magnetic strength of the field.

The apparatus whereby the above results are accomplished comprises a bipolar generator wit 1 a fixed winding or coil and an inductor or rotor in inductive relation to said winding or coil, whereby it, is possible to revolve the rotor or inductor at any desired rate of speed and to produce at least four alternations for each complete revolution of the rotor or inductor without any tendency to loosen or otherwise detrimentally afiect the winding or coil, and without the necessity of employing a governor to keep the speed of the inductor within prescribed limits.

My invention also consists in the features of construction and combinations of partsQas described in the specification, pointed out in the claims and illustrated in the accompany-- ing drawings. 4

in the accompanying drawings F gure l. 15

a view in side elevation of a generator cinbodying my invention. F'g. 2 is a view in end elevation of same. Fig. 4) is a secti on on line 3-3, Fig. 1. I Fig. 4 is a section on line 4-4, Fig. 1.. Figs. 5 to 8 inclusive illustrate four positions of the inductor and the disposition of magnetic flux during a half revolu- .tion of the inductor.

Again referring to the drawings, 1 represents a permanent horseshoe magnet, the north and south poles of which are indicated To each oi the poles of the said provided with arms 3 and at the end of the arms are arranged head pieces 4 having portions 4 projecting toward each other. One

face ofeach of the said heads is preferably arranged parallel with the plate 2 and the other face is curved corresponding to an arc of a circle slightly greater than the circle described by the revolution of the inductor. As soon the forked pole pieces are secured to the respective pole pieces of the permanent magnet, each forked pole piece becomes magnetized similarly to the pole to which it 18 secured, and there are then at each end of the permanent magnet a pair of poles, the poles in each pair having the same magnetism. d

An inductor or rotor 5, preferably of laminated iron, is mounted on a shaft 6 which is supported in bearings 7 and on the end of the shaft 6 is arranged a gear wheel 8 by means of which the shalt 6 can be driven as (lGSlIGu. An armature consisting of a coil or winding 10 is arranged partly within the pole pieces so as to be in inductive relation to the rotor or inductor 5. In the construction shown herein, the coil encircles the portions 4; of the head pieces 4 and the rotor or inductor 5. The coil 10 is, preferably, arran ed so as not to come in contact with the shai t 6, and the ends of the coil are left free so that they may be connected in any suit-' able manner to the terminals of the circuit through which the current generated is to flow. The generator is, preferably, mounted on any suitable base 12.

When the inductor is rotated or oscillated a change is, brought about in the direction and also a variation in the strength of the magnetic flux produced by the magnetic circuit passing into and through the inductor, the magnetic llux, either. cutting or flowing parallel with the coil 10. The variation in strength of the magnetic flux and the change in direction thereof, whereby it cuts or ceases to cut the coils produce an alternating potcntin! or voltage in the coils, which. in turn causes an alternating current to flow. With especial reference to Figs. 5 to 8 it will be" seen that when the inductor is lying between dissimiiar poles, that is between diametrically opposite poles, the magnetic flux (indicated by the arrows) will flow from one pole to the otherpole through the inductor magnet is secured 'a bifurcated ort'orlacd pole and will therefore thread or'cut the mail 10,

opposite poles the magnetic flux will again flow through the inductor but in the opposite direction vand a currentwill be induced in the coil which will flow through the coil in the opposite direction to that in which the current first passed throu h the coil; When the inductor assumes'' a orizontal position the m netic flux will again flow parallel with the coi and no current effect will be pro duced therein for the reasons given above. Therefore as the generator illustrated herein has four poles there will be four alternations of currents produced during every rotation of the inductor.

n will be noted that in the construction illustrated herein the coil notonly surrounds the flux-carrying portions of the inductor but has its axis at right angles with respect to the axisf'ef the inductor. With this arran'gement of parts, it follows that, when the inductor is in either of the positions shown in Figs. 5 and 7, the current generated in the coil b the magnetic flux through the inductor bui ds up the magnetism of the pole pieces which are not bridged by the inductor, with a comparativelyslight weakening of the magnetism of the pole pieces which are bridged by the inductor. The not result is to build up and maintain the magnetism ol' tire field." Meanhile, it will be apparent that, owing to the rotation of the inductor, and the arrangement of the same relative to the pole pieces lip d the coil or windingthere will bo but two reversals of magnetic llnx through-the inductor for each rot alion thereof and that the magnetic llux through the inductor will occur twice in the same direct ion before there is a reversal, whereby the rosisiance tothe passage oi" the magnolic llux through the inductor is much loss than would be the case were the llux through tho inductor reversed every time said inductor bridges diametrically opposite poic-piccos.

This reatly reduces lhc loss by hystorcsis, and t e not effect, both as to tho currrnl generated within the winding 1H and the building u and maintaining of tho nmgnctism of tho ield, will bc greatly inrrcascd over that obtained by reversing the magnetic flux through the inductor consccntivcly with such reversal through the armature or winding. I

It will be readily seen that, with my con struction no brushes or moving contacts are necessary, which not only makes it possible to simplify the'construction of the generator.

piece, thepole pieces which are of'similar magnetism being arranged consecutively in a an arc of a circle and so thateaclnpole hasa pole of dissimilar magnetisinioppos te to it, a rotary inductor extending between'said pole pieces and at anan le to the plancszthereof,

pole-pieces, and means .for continuously rom said winding, substantially as specified.

2. In an alternating current generator, the combination of a permanent magnet having each end thereof provided with a plurality of ole pieces, the pole pieces which are of simiar magnetism being arranged consecutively in an arc of a circle and so that each pole has a pole of dissimilar magnetism opposite to it, a rotary inductor extending between said pole pieces and at an angle to the planes thereof, means for rotating said inductor, and a fixed winding in the recesses between the pole pieces and extending entirely around the flux-carrying portions of the inductor, substantially as specified.

3. in an alternating current generator, the -oml)ination oi a permanent magnet having. each end thereof provided with a pair of poles projecting therefrom, the poles of each air having a portion projecting toward the ot ier, a winding surrounding the projectim por tions of the poles, and a rotary in uctor within said winding and arranged in inductive relation to said winding and to said poles, substantially as spcrilicd.

4'. in an alternating current generator, the combination of a permanent magnet having ouch end thereof provided with a pair of polcs projecting therefrom, the poles of each pair each having a portion projecting toward the other, a winding surroumling the projecting portions ol' the poles, and a rotary inductor within said winding and arranged in induct ivo relation to said winding and to said polcs with its axis at an angle to the planes of said poles and to the axis of said winding, substantially as spccilicd.

1 5. in an alternating curronl generator, the combination of a plurality of magnetic poles,

the poles of similar magnetism being arrangcd consccutivvjy In an arc of a circle and so that each pole has opposite to it a pole oi but also makes the generator available foreach end thereof provided with a forked pole a fixed winding in t ic recesses of the; forked tating said inductor, the parts being'arranged: to augment the magnetism of the field of the ermanent magnet by the current generated dissimilar magnetism, the poles of like mag- In testimoroy whereof, I sign the foregoing nemsm having poruons projec-tmg toward specaficatlon n the presence of twowltnesses.

oaol other, wmdmg su r r0und1ng such pro- 1 CHARLES G RUPRECHT. ectmg pormpns 0f sz1?d poles and a rotary 1nducto1 ontlrely wlthm Salld. wlndmg and ar- 1 Wltnessesz ra.11ged 1n lnduot ive relatlon to said wlndmg I VICTOR C. LYNCH, and sold. poles, substantmlly as specified. i N. L. MODONNELL. 

